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#!/bin/bash
# Copyright (c) 2004-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# Contributed by Roy Marples (uberlord@gentoo.org)
# Fix any potential localisation problems
# Note that LC_ALL trumps LC_anything_else according to locale(7)
dhclient() {
LC_ALL=C /sbin/dhclient "$@"
}
# void dhclient_depend(void)
#
# Sets up the dependancies for the module
dhclient_depend() {
after interface
provide dhcp
functions interface_exists interface_get_address
variables dhclient dhcp
}
# bool dhclient_check_installed(void)
#
# Returns 1 if dhclient is installed, otherwise 0
dhclient_check_installed() {
[[ -x /sbin/dhclient ]] && return 0
${1:-false} && eerror "For DHCP (dhclient) support, emerge net-misc/dhcp"
return 1
}
# bool dhclient_stop(char *iface)
#
# Stop dhclient on an interface
# Always returns 0
dhclient_stop() {
local iface="$1" pidfile="/var/run/dhclient-$1.pid"
[[ ! -f ${pidfile} ]] && return 0
ebegin "Stopping dhclient on ${iface}"
local ifvar="$(bash_variable "${iface}")"
local d="dhcp_${ifvar}"
d=" ${!d} "
[[ ${d} == " " ]] && d=" ${dhcp} "
if [[ ${d} == *" release "* ]] ; then
local dhconf="interface \"${iface}\" {\n \
script \"${MODULES_DIR}/helpers.d/dhclient-wrapper\";\n \
}\n"
local r="$(echo -e "${dhconf}" \
| dhclient -q -r -pf "${pidfile}" "${iface}" )"
[[ ${r} == "deconfig" ]]
eend $? "dhclient returned ${r}"
else
start-stop-daemon --stop --exec /sbin/dhclient --pidfile "${pidfile}"
eend $?
fi
}
# bool dhclient_start(char *iface)
#
# Start DHCP on an interface by calling dhclient $iface $options
#
# Returns 0 (true) when a DHCP address is obtained, otherwise 1
dhclient_start() {
local iface="$1" ifvar="$(bash_variable "$1")"
local pidfile="/var/run/dhclient-${iface}.pid"
local cffile="/etc/dhcp/dhclient.conf"
interface_exists "${iface}" true || return 1
# Load any dhclient.conf instructions specified by the user
local opts="dhclient_conf_${ifvar}"
local dhconf="${!opts}"
# Load our options
opts="dhclient_${ifvar}"
opts="${!opts}"
# Work out our cffile
local x="${opts##* -cf }"
if [[ ${x} != "${opts}" ]]; then
x="${x%% *}"
if [[ -n ${x} ]]; then
cffile="${x}"
opts="${opts//-cf ${cffile}/}"
fi
fi
# Warn that we're going to override parts of their cffile
if [[ -e ${cffile} ]] ; then
opts="${opts} -cf ${cffile}"
if grep -q "^[ \t]*script[ \t]" "${cffile}" ; then
ewarn "The script specified in ${cffile} will not be used"
fi
fi
local d="dhcp_${ifvar}"
d=" ${!d} "
[[ ${d} == " " ]] && d=" ${dhcp} "
local ah=""
# Send our hostname by editing cffile
if [[ ${d} != *" nosendhost "* ]] ; then
local hname="$(hostname)"
if [[ ${hname} != "(none)" && ${hname} != "localhost" ]]; then
ah="send host-name \"${hname}\"\n;"
# Warn that we're going to override parts of their cffile
if [[ -e ${cffile} ]] ; then
if grep -q "^[ \t]*send[ \t]*host-name[ \t]" "${cffile}" ; then
ewarn "The host-name \"${hname}\" will be sent instead of"
ewarn "the one specified in ${cffile}"
vewarn "Set dhcp_${ifvar}=\"nosendhost\" in /etc/conf.d/net"
vewarn "to stop this from happening"
fi
fi
fi
fi
dhconf="${dhconf} interface \"${iface}\" {\n \
script \"/${MODULES_DIR}/helpers.d/dhclient-wrapper\";\n \
${ah}
}"
# Bring up DHCP for this interface (or alias)
ebegin "Running dhclient"
x="$(echo -e "${dhconf}" | dhclient ${opts} -q -1 -pf "${pidfile}")"
# We just check the last 5 letters
[[ ${x:${#x} - 5:5} == "bound" ]]
if [[ $? != "0" ]]; then
# Kill the offending daemon as it likes to hang around
start-stop-daemon --stop --exec /sbin/dhclient --pidfile "${pidfile}"
eend 1 "${x}"
return 1
fi
eend 0
# DHCP succeeded, show address retrieved
local addr="$(interface_get_address "${iface}")"
einfo "${iface} received address ${addr}"
return 0
}
# vim:ts=4
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